Method of removing impurities and similar matter from staple fibres in ringless spinning and device for performing said method

ABSTRACT

A method of removing impurities from staple fibres in ringless spinning and a device for performing said method. The impurities are ejected immediately after being contacted by the combing roller into a withdrawing space by the effect of the acceleration imparted thereto by said contact. Spinning units including a fibre separating mechanism and a rotary underpressure spinning chamber are employed. The inlet or the guiding walls for said impurities are directed in view of the separating roller tangentially. The withdrawing space can be connected to the central sucking device of the machine.

United States Patent [191 Kabele et al.

[ Dec. 11, 1973 METHOD OF REMOVING IMPURITIES AND SIMILAR MATTER FROMSTAPLE FIBRES IN RINGLESS SPINNING AND DEVICE FOR PERFORMING SAID METHOD[75] Inventors: Stanislav Kabele; Ctibor Doudlebsky; Frantisek Jaros;Zdenek Svec; Bohumir Brozek, all of Usti nad Orlici, Czechoslovakia [73]Assignee: Vyzkumny ustav bavlnarsky, Usti nad Orlici, Czechoslovakia[22] Filed: May 13, 1970 [21] Appl. No.: 36,883

[30] Foreign Application Priority Data May 16, 1969 Czechoslovakia346/69 [52] US. Cl 57/58.89, 57/56, 57/58.95,

[51] Int. CL... D01h 7/02, D0lg 15/00, DOlg 23/00 [58] Field of Search57/58.8958.95, 56, 156

[5 6] References Cited UNITED STATES PATENTS 3,339,359 9/1967 Ripka etal. 57/58.89

3,360,918 1/1968 Doudlebsky et al. 57/58.95 3,439,488 4/1969 Bucil et al57/58.95 3,487,626 1/1970 Rajnoha et al 57/58.95 X

FOREIGN PATENTS OR APPLICATIONS 880,239 10/1961 Great Britain 57/58.89

Primary Examiner-Donald E. Watkins Attorney-Michael S. Striker [57]ABSTRACT A method of removing impurities from staple fibres in ringlessspinning and a device for performing said method. The impurities areejected immediately after being contacted by the combing roller into awithdrawing space by the effect of the acceleration imparted thereto bysaid contact. Spinning units including a fibre separating mechanism anda rotary underpressure spinning chamber are employed. The inlet or theguiding walls for said impurities are directed in view of the separatingroller tangentially. The withdrawing space can be connected to thecentral sucking device of the machine.

9 Claims, 4 Drawing Figures CENTRAL METHOD OF REMOVING IMPURITIES ANDSIMILAR MATTER FROM STAPLE FIBRES IN RINGLESS SPINNING AND DEVICE FORPERFORMING SAID METHOD The object of the present invention is a methodof removing impurities and similar matter from staple fibres in ringlessspinning in spinning units including a fibre separating mechanism and arotary underpressure spinning chamber, and a device for performing saidmethod.

In ringless spinning are various impurities, as e.g., fragments ofcapsules, kernels, and leaves of cotton, fibre conglomerates andpeelings of synthetic fibres are the frequent reson for yarn breakageand have an unfavorable effect on the quality of the spun yarn also bycausing a filling of the collecting surface of spinning chambers, thuscausing a change of the values of the spun yarn, whereupon arises thenecessity of removing periodically the said impurities.

The indirect influence of these impurities in the fibre material to beprocessed in the spindeless spinning machines is hitherto avoided bydemanding a higher degree of cleanliness of the presented sliver thisbeing connected directly with higher expenses for the preparation of thefibre sliver. Even thus it is impossible to attain a particularlyfavourable state.

The present invention has the purpose to remove the said disadvantagesand to establish a method of and a device for enabling the spinning offibrous materials to be processed even when lower requirements are puton the material as to the content of impurities.

The subject matter of the method according to the present inventionconsists in that the impurities are ejected immediately after beingcontacted by the combing roller into a withdrawing space by the effectof the acceleration imparted thereto by said contact.

The subject matter of the device for performing said method consists inthat the inlet into the withdrawing space is made in the wall of thehollow of the body of the fibre separating mechanism which is situatedoppositely to the operating part of the combing (fibre separation)roller, in the section between the separating zone and the passage ofthe hollow into the exit channel. It is advanatgeous according to thepresent invention when the inlet is directed at least approximatelytangentially in view of the fibre separating roller.

According to the present invention, at least approximately tangentiallydirected guiding surfaces can be arranged at the inlet, or said inletcan be constituted by channels arranged behind each other.

An embodiment is advantageous, in which the width of the inlet is equalat least to the width of the operating part of the fibre separatingroller.

From the viewpoint of attendance, an embodiment is favourable, in whichthe withdrawing space is connected to the central sucking device of themachine.

Embodiments in form of example according to the present invention arediagrammatically shown in the accompanying drawings, of which FIG. 1represents a section through the fibre separating mechanism;

FIG. 2 an embodiment with an inlet including guiding walls; a

FIG. 3 an embodiment of the inlet including channels;

FIG. 4 a view through the inlet as shown in FIG. 1, on the fibreseparating roller.

The staple material 1 is fed by the feeding roller 2, and passes throughthe resilient condensing plate 3 to the fibre separating roller 4 whichrotates at a high speed, the cylindrical operative part of said rollerbeing provided with fibre separating tips 41. At the point of thestrongest action of the fibre: separating roller 4 upon the fibres ofsliver 1, i.e., in the so called fibre separating zone 5, separation offibres from the sliver 1 takes place. The said fibers combed out fromthe sliver l are brought into the exit channel 6 which debouches on thesliding wall of a not shown, known spinning chamber, in which saidfibres are transformed into yarn, all this being generally known.

In the zone between the fibre separating zone 5 and the passage 711 ofthe hollow 71 of body 7, in which the separating roller 4 is arranged,an inlet 8 is provided in wall 712 into the withdrawing space 81, at aposition opposite to the operative part of the fibre separating roller4.

This inlet 8 has advantageously an at least approximate tangentialcourse in view of the separating roller 4.

In the embodiment as shown in FIG. 2, tangentially arranged guidingwalls 82 are mounted in the inlet 8.

In the embodiment as shown in FIG. 3, the inlet is constituted bychannels 83 arranged mutually beside each other.

It is advantageously when the width of the inlet 8 is at least equal tothe width of the operative part of the separating roller 4 as can beseen in FIG. 4.

The withdrawing space 81 can be emptied periodi' cally or can beadvantageously connected to the diagrammatically illustrated centralsucking device of the machine (see FIG. 1).

Immediately after being contacted by the separating roller 4, theimpurities as given above, which have a heavier mass than the fibres tobe spun, are ejected upon action of the centrifugal force exerted by theseparating roller 4 into the inlet 8, through which they are broughtinto the withdrawing space 81, from which they are removed eitherperiodically or continuously by the central sucking device. Togetherwith the mentioned impurities, also too short fibres can be removed insuch manner, which would be useless as a part of the yarn to be spun.

What we claim is:

1. In a method of ringless spinning, the steps of advancingimpurities-containing unopened fibers in a path leading to a spinningchamber; opening said fibers during advancement of the same so thatimpurities are liberated from them; continuously discharging theliberated impurities from said path into a withdrawing space which is inopen communication with said path; and continuously withdrawing thedischarged impurities from said withdrawing space by suction.

2. A method as defined in claim 2, wherein the step of discharging theliberated impurities comprises accelerating the same in a directionoutwardly of said path.

3. A method as defined in claim 2, wherein the step of opening saidfibers comprises subjecting the fibers to the combing-out action of acarding roller.

4. In an apparatus for ringless spinning of fibers, a combinationcomprising fiber passage means for advancement of fibers towards aspinning chamber; supply means for supplying unopened fibers into saidfiber passage means; fiber opening means for opening said fibers duringadvancement thereof in said fiber passage means towards said spinningchamber; impurities discharge passage means communicating with saidfiber passage means for continuous discharge of impurities which areliberated from the opened fibers; and suction means in opencommunication with said impurities discharge passage means forcontinuous withdrawal from the same of discharged impurities.

5. A combination as defined in claim 4; further comprising a hollow bodyhaving said passage means formed therein; and wherein said fiber openingmeans comprises a fiber opening roller rotatable in said hollow body.

6. A combination as defined in claim 5, wherein said fiber passage meanscomprises a first passage portion extending downstream from said supplymeans for advancement of unopened fibers, and a second passage portionextending from said first passage portion towards said spinning chamberfor advancement of opened fibers; and wherein said impurities dischargepassage means communicates with said fiber passage means between saidpassage portions of the same.

7. A combination as defined in claim 6, wherein said impuritiesdischarge passage means has an inlet which communicates with said fiberpassage means at least substantially tangentially with reference to saidfiber opening roller.

8. A combination as defined in claim 7; and further comprisingtangentially oriented guide baffles mounted in said inlet 9. Acombination as defined in claim 5, wherein said impurities dischargepassage means has an inlet which communicates with said fiber passagemeans; and further comprising guide baffles mounted in said inlet andoriented substantially tangentially with reference to said fiber openingroller.

1. In a method of ringless spinning, the steps of advancingimpurities-containing unopened fibers in a path leading to a spinningchamber; opening said fibers during advancement of the same so thatimpurities are liberated from them; continuously discharging theliberated impurities from said path into a withdrawing space which is inopen communication with said path; and continuously withdrawing thedischarged impurities from said withdrawing space by suction.
 2. Amethod as defined in claim 2, wherein the step of discharging theliberated impurities comprises accelerating the same in a directionoutwardly of said path.
 3. A method as defined in claim 2, wherein thestep of opening said fibers comprises subjecting the fibers to thecombing-out action of a carding roller.
 4. In an apparatus for ringlessspinning of fibers, a combination comprising fiber passage means foradvancement of fibers towards a spinning chamber; supply means forsupplying unopened fibers into said fiber passage means; fiber openingmeans for opening said fibers during advancement thereof in sAid fiberpassage means towards said spinning chamber; impurities dischargepassage means communicating with said fiber passage means for continuousdischarge of impurities which are liberated from the opened fibers; andsuction means in open communication with said impurities dischargepassage means for continuous withdrawal from the same of dischargedimpurities.
 5. A combination as defined in claim 4; further comprising ahollow body having said passage means formed therein; and wherein saidfiber opening means comprises a fiber opening roller rotatable in saidhollow body.
 6. A combination as defined in claim 5, wherein said fiberpassage means comprises a first passage portion extending downstreamfrom said supply means for advancement of unopened fibers, and a secondpassage portion extending from said first passage portion towards saidspinning chamber for advancement of opened fibers; and wherein saidimpurities discharge passage means communicates with said fiber passagemeans between said passage portions of the same.
 7. A combination asdefined in claim 6, wherein said impurities discharge passage means hasan inlet which communicates with said fiber passage means at leastsubstantially tangentially with reference to said fiber opening roller.8. A combination as defined in claim 7; and further comprisingtangentially oriented guide baffles mounted in said inlet.
 9. Acombination as defined in claim 5, wherein said impurities dischargepassage means has an inlet which communicates with said fiber passagemeans; and further comprising guide baffles mounted in said inlet andoriented substantially tangentially with reference to said fiber openingroller.